Display screen or portion thereof with a graphical user interface



The FIGURE is a front view for a display screen with a graphic userinterface showing my new design.

The broken lines around the FIGURE showing a display screen or portionthereof are included for the purpose of illustrating environmentalstructure. The broken line showings of the text, numbers, symbols,function marks, and images in FIGURE are included for the purpose ofillustrating portions of the display screen with a graphic userinterface. The broken lines form no part of the claimed design.

CLAIM The ornamental design for a display screen or portion thereof witha graphical user interface, as shown and described.